Altes Schloss, castle in Neustadt an der Waldnaab, Upper Palatinate, Germany

Altes Schloss is a castle in Neustadt an der Waldnaab, Bavaria, built in the 16th century for Johann Georg von Heydeck on the site of an earlier castle of the Counts of Altendorf, probably from the 13th century. The late Gothic structure stands in the town centre; the site is recorded as a protected monument and as an archaeological monument, including underground traces of the medieval castle.

The castle originated in the 13th century and received a new roof in 1543. The Lobkowitz family took over the building in the 17th century, and in 1818 an upper floor was added to the front section.

The castle's name marks it as the older of the town's fortified buildings. Local residents view it as a symbol of their town's past and a reminder of the noble families who once held power here.

The building sits at Stadtplatz 36 in the town center and is easily reached on foot. Access is through a covered entry, and visitors can explore the exterior structures or attend occasional exhibitions and events held inside.

The roof underwent complete reconstruction in 1543, a detail recorded in historical documents. This rebuild shows how residents maintained and adapted the building across generations.